Astronomy Picture of the Day——月球上的空间站剪影
Discover the cosmos! Each day a differentimage or photograph of our fascinating universe is featured, along with a briefexplanation written by a professional astronomer.
Space Station Silhouette on the Moon
Image Credit & Copyright: Eric Holland
Explanation: What's that unusual spot onthe Moon? It's the International Space Station. Using precise timing, theEarth-orbiting space platform was photographed in front of a partially litgibbous Moon last month. The featured image was taken from Palo Alto,California, USA with an exposure time of only 1/667 of a second. In contrast,the duration of the transit of the ISS across the entire Moon was about half asecond. A close inspection of this unusually crisp ISS silhouette will revealthe outlines of numerous solar panels and trusses. The bright crater Tycho isvisible on the lower left, as well as comparatively rough, light coloredterrain known as highlands, and relatively smooth, dark colored areas known asmaria. On-line tools can tell you when the International Space Station will bevisible from your area.
月球上的空间站剪影
月球上那奇怪的小东西是什么？它是国际空间站。上月，围绕地球轨道运行的国际空间站在准确的时间穿过被照亮的月球区域前方。照片拍摄于美国加州帕洛阿尔托，曝光时间只有1/667秒。而国际空间站穿越整个月球也仅需要半秒。仔细观察，在国际空间站异常纤细的剪影上还能够清晰辨认出太阳能电池板和桁架的轮廓。明亮的第谷环形山在照片的左下角清晰可见，另外还能看到颜色较浅而又相对粗糙的月球高地，以及颜色较深而又相对平滑的月海。在线软件能够告诉你，你所在的区域何时能看到国际空间站。
在线软件地址：
https://spotthestation.nasa.gov
近期文章：
Astronomy Picture of the Day——宇航员在月球上射门得分